Keltham has already been feeling guilty about the level of stress he might hypothetically be putting this girl under, unless she's the local equivalent of a Keeper trainee as part of a massive government confusion operation, but if she's not then he's not unaware of how this might be stressful for her.
Ironically enough, it's the question of 'How mean have I been to her, exactly, and how much of a favor do I owe her now?' that suggests his last query. Maybe she doesn't think he owes her a favor at all. "On a scale from 'way too little' to 'way too much', would you say that I'm currently being more suspicious than is appropriate for Golarion in general and Cheliax in particular, or not suspicious enough?"